# Lost in the World of Succubi

> ResidualPlay case file: an overlooked Steam game still earning residual revenue. Estimates carry a ±30-50% error range per title.

- Steam appid: 3803780
- Developer: Shimofumi-ya
- Publisher: OTAKU Plan
- Released: 2025 · Genre: Action · List price: $13.99
- Deal grade: D (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $344 to $516 per month (mid $430)
- Opportunity score: $430/month at x1.00 dormancy multiplier
- Est. lifetime owners: 2.0k · Est. lifetime net revenue: $9.3k
- Review sentiment: 91% positive across 101 reviews (62 from Steam purchases)
- Review velocity: 3.7 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 6 months ago
- Last build shipped 12 months ago
- Store page localized in only 4 language(s)

## Where a gross dollar goes (monthly, at current velocity)

| Stage | USD/month |
|---|---|
| Gross storefront sales | $781 |
| After VAT / sales tax (-13% blended) | $679 |
| After refunds (-9.5% median) | $615 |
| Net to developer (after Steam 30%) | $430 |

## Monthly review counts, oldest to newest (11 months)

25, 3, 5, 1, 4, 4, 6, 2, 1, 2, 7

## Markets by review language

- english: 38%
- koreana: 5% (game NOT localized in this language)
- russian: 4% (game NOT localized in this language)
- spanish: 2% (game NOT localized in this language)
- schinese: 43%
- brazilian: 4% (game NOT localized in this language)
- french: 2% (game NOT localized in this language)
- german: 4% (game NOT localized in this language)

Localization gap: 20% of measured reviews are written in languages the game does not support (top: koreana). Localizing is likely immediate market expansion.

## Methodology

Units are estimated from Steam-purchase reviews times a release-cohort multiplier (Boxleiter method, 20-75x by year). Revenue uses an effective price (lifetime discounts and regional pricing) and nets out VAT (~13%), refunds (~9.5%) and Steam's 30% cut: roughly 55% of gross reaches the developer.

Source: https://residualplay.com/game/3803780
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.